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Computation of Earnings Per Share - Summary of Calculation of Basic Earnings Per Common Share and Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Numerator:
Net income	$ 71,391	$ 49,810	$ 102,519	$ 90,695	$ 121,201	$ 193,214
Denominator:
Denominator for basic earnings per share-weighted average common shares	26,739		26,691		26,730	26,682
Dilutive effect of share-based awards	46		111		52	116
Denominator for diluted earnings per share-adjusted weighted average common shares	26,785		26,802		26,782	26,798
Basic Earnings Per Share	$ 2.67		$ 3.84		$ 4.53	$ 7.24
Diluted Earnings Per Share	$ 2.67		$ 3.83		$ 4.53	$ 7.21

X

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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